Email Warmup Solution

Part of Senders Protocol, our email warmup solution helps protect your reputation, while improving deliverability. We’ve established a tried and tested warmup process that gradually prepares your mailboxes, domain, and your IP addresses for sending, and enables the steady volume increases for your campaign. This slow and controlled warmup strategy is the most effective way to use outbound securely and reach more people without damaging your reputation.
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How We Do It?
Our email warmup solution will be tailored to the starting reputation of your domain/IP, as well as the goals you want to achieve with your campaigns. We understand that each business comes to us with a different initial setup, which is why we always make sure our process can be adapted to your specific needs. Our team in charge of warmup will prepare each of your domains (and subdomains) for sending, with optimal outreach priority in mind. Above all, we put safety first: we only use warmup tactics that work, to make sure your emails won’t be flagged and your domains won’t be blacklisted. We also ensure ongoing support and performance monitoring, so you are in the loop throughout the process.
Email Warmup Explained
Although our email warmup solution is uniquely tailored to your requirements, warmup always involves a few steps that are essential for your outreach to work. Warmup is the key step that defines to what extent your outbound will be successful, which is why we always follow a set of steps, including: IP/domain warming, proper authentication, building backup options, and controlled volume increases.
What is Senders Protocol ™?
Our email verification services are at the heart of Senders Protocol ™. They entail an intricate sequence of steps we repeat each time you expand your email lists. We won’t get into all the nitty gritty nerdy details, but, here are a few core components included in our email verification process: domain validation, DNS record checks, SMTP verification, and syntax checking.
The only complete email deliverability solution that combines cutting-edge infrastructure and our proprietary methodology. One-of-a-kind, Protocol is our rigorous approach to email deliverability with restorative and preventative measures baked in. Ensure safe email scalability to match your growth goals.
email deliverability solutions background image 1
Senders Protocol ™ is a proprietary email deliverability solution that combines in-house and off-the-shelf tech tools, IP addresses, subdomain and DNS Configurations, testing patterns, and intervention procedures.
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Austin Beveridge
,,Beyond deliverability expertise, we wanted an outreach partner with a strong understanding of the VC/startup...'' Read full case study
Stephanie Corder
“There are so many moving parts of our business – why should we deal with as many moving parts needed for email...'' Read full case study
Karel Montes
“Getting things done more efficiently is a big part of what 8base is about. We understand the importance of fostering...'' Read full case study
Carlos Escutia
,,Our experience with Senders has been great over the years. Lead Strategist (Velimir) and the team are able to adapt...'' Read full case study
Peter Demangos
“We wanted an efficient, scalable way to reach more people who could benefit from our platform. Email outbound...'' Read full case study
Aeron Sullivan
,,We wanted to add more volume to our campaigns without worrying about the backend – email warming...'' Read full case study
Michael Storan
“Compliance is at the core of our business, and deciding to reach out to prospects meant we wanted to make sure...'' Read full case study
SUSO Digital
Will Bagnall
,,Senders provides strategists who communicate effectively and execute the strategies that their team formulated for us...'' Read full case study
Senders' Case Studies
SUSO Digital
Industry - Marketing & SEO
Project length - 2 years
Key result - Market growth, funnel saturation
Industry - Information Technology & Services
Project length - ongoing
Key result - New market penetration
Industry - Fintech
Project length - Ongoing
Key result - Safely scaled email outbound, moved off of Google, improved processes 

Founded by chef David Chang, Momofuku is a renowned culinary brand with a nation-wide presence, including restaurants and an online store with delicious goods. They ran into an issue with their email sending – high bounce rates and blocked sending.

With hundreds of thousands of people on their email lists eager to stay informed, and an impeccable reputation to uphold, Momofuku wanted to nip this problem in the bud quickly.

  • Momofuku reached out to Senders to run a diagnostic test on their sending infrastructure and find the root cause
  • Senders deliverability experts discovered an issue with their DMARC, which was preventing emails from being sent, as their WordPress wasn't aligned with their SPF
  • Senders provided the most effective solution helping Momofuku restore safe sending, and suggested next steps to ensure everything keeps running smoothly on their end
  • The client reported that Senders helped identify the problem and got them back on track 

Up for coffee with a health kick, sans the jitters? Try Everyday Dose – a brand on a mission to provide coffee lovers with a healthy alternative packed with all kinds of goodies. The Founder, Jack Savage, learned through personal experience that we needed an option that doesn’t lead to a slew of possible side-effects. That’s how this mushroom-based blend with nootropics and collagen protein came to be, helping boost focus, energy, and reduce stress in one go.

The Everyday Dose team prides itself on excellent customer support, in addition to their delicious set of products. So when they spotted DNS propagation issues setting up their customer experience platform, they reached out to Senders to find the best way to sort it out.

  • Senders deliverability experts confirmed the problem the team at Everyday Dose initially diagnosed
  • To enable healthy DNS propagation, the Senders team helped clean their DNS registrar of old DNS records that were causing issues with propagation
  • The client reported they were now able to set up their DNS correctly, enabling them to run their platform smoothly stands out as a trailblazer in empowering women entrepreneurs through technology and a supportive community. offers a cutting-edge range of AI-powered SaaS marketing and sales tools that cater specifically to female entrepreneurs and women-led businesses. enables users to automate marketing and sales, while helping them scale their authentic selves while saving time and boosting conversions. Their Myrina’s Army community fosters a supportive platform that champions female entrepreneurs and their values, empowering them to conquer barriers and achieve their business goals. The company's dedication to providing not only top-notch technological solutions but also a platform for networking and mentorship underscores their commitment to fostering success among women in the entrepreneurial space.

Naturally, they wanted to make sure their email sending infrastructure was set up correctly to protect their reputation and successfully reach their recipients. Our deliverability team worked with the client’s team on:

  • Aligning the client’s three domains with Amazon to make sure they are compatible and optimized in order to integrate with Amazon’s system.
  • Setting up a proper DMARC policy to protect their domains against unauthorized use and phishing scams.
  • Enhancing email deliverability as well as security, so that each email sent from these domains can be properly authenticated and more likely to land in the right inbox.
  • As a result, the client can protect the reputation of their business and domains, while safely sending out their email campaigns. 

Sometimes the sheer number of options of any product can be daunting – how on earth do you pick the right one? This is especially true with supplements, as we can find them just about anywhere, but we can rarely understand a third of the ingredients listed. Unlike most, Physician’s Choice provides supplements with pure, potent ingredients that work. No fillers or “proprietary” blends with unidentified ingredients. They do the research, so you don’t have to.

Integrity and transparency are part of their core values, so when their team ran into sending issues, they were referred to Senders.

  • The client’s team spotted issues with DMARC failures in Google Postmaster
  • The Senders deliverability team worked with the client to update the DMARC configuration to enable report collection
  • The client is now able to obtain detailed reports to diagnose the exact causes of the failures and prevent them in the future with proper DMARC setup
All Case Studies
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Deliverability and Strategy

How is Senders different from other similar companies?

Unlike most other companies, we don’t use Google or Microsoft to send, which reduces the risk of reputation damage or your emails landing in spam.

Why should I use Apollo?

Apollo enables us to use Sendgrid and other proprietary tech tools for safe sending, without having to rely on Google’s infrastructure.

Who is Senders ICP?

We work with small to medium-sized B2B companies across various industries (many of our clients are SaaS), mainly in the US, Canada, and the EU.

What is your pricing structure?

Our pricing varies depending on each client’s needs, but our deliverability service starts at $1200. You can learn more about our pricing here.

Which platform do you use to send out the emails?

We manage the infrastructure without owning the sending platform. Instead, we connect with platforms like SendGrid.

How long does it take to reach the full volume of sending?

With our warming protocols to protect deliverability, it takes 7 weeks or more depending on the time of year – holidays may extend the process.

Are the replies automatically encoded?

No, your Strategist/Account Manager does that manually.

What does warm-up mean?

Among other things, warming entails gradually increasing the volume of emails sent from a new email domain/subdomain to build a positive sending reputation with Internet Service Providers (ISPs).

If we’re paying for three senders why do we only get Strategy services on one?

We have defined the Strategy service in a way to provide maximum value for each client despite the number of senders you may have. While the Strategist will dedicate their expertise to one sender, you can always leverage that knowledge to optimize performance for the other senders, as well.

How can you ensure that someone who has already replied isn't emailed again?

Apollo automatically disqualifies (removes) anyone that either replied, bounced or unsubscribed from the email sequence.

How do you handle email testing?

We always provide at least two email variants for the most important steps in your sequence (such as step one and step three), so that we can track their performance and spot best-performing email variants for different target groups. We also test out different subject lines and react quickly if we notice any drops in performance, so we can adjust the copy while campaigns are running.

What are “email sequences”?

An email sequence is a series of emails (at least two, usually no more than five) that we send out to a specific target group, several days apart, depending on our agreement with you. We call the first email “the first step” of the sequence, while the second email is called “a nudge” and is usually a short follow-up we send a couple of days after the first. The number of steps (emails) in a sequence depends on your industry, target audience, and your goal, so we adapt the approach specifically to your business and outreach goals.

Can we ramp-up faster?

We have done extensive experiments, and over time, we have seen that the best, safest way forward is slowly and gradually ramping up by increasing the sending volume by 25 emails per day. We do not recommend ramping up faster, as it may affect your reputation and overall deliverability.

Why do we need to set up email filters on our receiving end?

Usually, forwarded emails tend to “break” the technical backend such as SPF, DKIM (your email authentication methods) and that can send emails to spam. To prevent that, we make sure that any email that is forwarded from our system to your mailbox will end in your inbox – this is where setting up those filters correctly makes all the difference.


What will you base your email copy on for my campaigns?

We have a discovery form you can fill out to give us specific information that you’d like us to include in the strategy and the copy. That also includes your targeting goals, as well as examples of emails you like or have had success with in the past. We combine that information with our own internal best practices based on the thousands of emails we’ve written and sent over the years. On top of that, we pick out the best-performing approaches for your industry, customize them to your needs, and test them out for you, as well.

What if I don’t like the email copy you provide?

We always go through as many rounds of edits and changes as we need to create the kind of emails you will be happy with. However, we also track your campaigns’ performance to jump in and adapt the copy over time so that we can maximize your results.

Do you send the same emails to all target audiences?

We don’t. To maximize deliverability and to make sure each target group receives the kind of message they will be most likely to respond to, we tailor the emails to each of your target groups. Sometimes, there will be some overlaps in the core message and your value proposition, but we will vary the language for better deliverability.

Can we include links in the email copy?

In some emails and some steps, we can include links to your website and to specific pages you want people to visit (such as sign-up pages). However, we strive to create a balance between emails with and without links to see which ones perform better for your specific target audience. And of course, we always want to include unsubscribe/opt-out links in emails.

How important is email copy for deliverability?

Email copy is an important part of ensuring high deliverability for your campaigns, but it is definitely not the only segment we’re taking care of and tracking. The better the copy is and the better your product-market fit, the greater the engagement will be, so we do our best to create engaging copy that will improve open rates, click-through rates, and replies.

Do you use AI for copywriting?

No, we don’t use AI for writing our emails. We have a team of exceptional strategists and writers that work together with you to create the kind of copy you will be happy with, aligned with our best practices and years of experience.

Is copywriting included in all your deliverability services?

Email copywriting is considered an add-on. While it is included in the strategy service, it is not part of our deliverability-only service tier called Protocol. If you need help with copywriting, however, but you don’t want the full strategy service, we can provide a dedicated copywriter for as many sessions as you need, either to write the copy for you from scratch, or to review/adjust your existing copy to make it deliverability-friendly. You can learn more about all the available add-ons on our Pricing page.


Do you whitelabel?

We typically don’t do whitelabel partnerships, unless it is the only solution that makes sense for everyone involved.

How can I be part of your Partnership community?

You can reach out to us via our Partnerships page to express interest and meet our Partnership Manager, Aurora. During that call, you can share your goals, get a better idea of the criteria for joining and learn more about the program itself. If there’s a fit, you can proceed with the application. We also like our partners to stay engaged for ongoing collaboration, to make sure everyone can benefit from the relationship.